Rec1

Wednesday, 8 April 2015

How To Service Throttle Actuator?

Throttle Bore Idle Air Control Service

Throttle Actuator Servicing

Helpful Information

When mass volumes of air is processed through the air intake throttle actuator bore it will leave deposits that hurt engine performance. These deposits effect the idle air control motor which can cause stalling. This service should be performed whenever a tune up is performed. Each manufacturer has their own design when it comes to the throttle system of an engine but the principle remains the same. An electronic throttle actuator requires no idle valve or circuitry as the computer will adjust the main butterfly to arrive at the desired engine idle speed.

Step 10 - Once the gasket or "O" ring has been removed, use carburetor cleaner and a shop towel to clean the intake inlet.

Clean Intake Manifold Inlet

Step 11 - Looking from the rear of the throttle bore coking deposits are observed which is caused by impurities in the air. These deposits can cause the engine to idle radically and in some cases, stalling.

Coking Deposits

Step 12 - Using a shop towel and carburetor cleaner wipe the bore and butterfly until clean.

Clean Bore w/Butterfly

Step 13 - Once thoroughly cleaned the throttle actuator is ready to be reinstalled.

Cleaned Throttle Bore Actuator

Step 14 - After the throttle bore has been cleaned, remove the mounting screws to the idle air control valve.

Removing Idle Air Control Valve

Step 15 - Next, gently remove the valve from the throttle bore.

Idle Air Control Valve

Step 16 - After the valve has been removed, inspect for coking deposits similar to the throttle actuator.

Idle Valve Coking Deposits

Step 17 - Then, using carburetor cleaner, spray the valve internally using a shop towel to help clean the valve.

Clean Idle Air Control Valve

Step 18 - Once the valve is clean, use cleaner to wash out deposits from the idle valve transfer ports.

Cleaning Idle Air Ports

Step 19 - After cleaning the idle air control valve, reinstall the valve onto the throttle bore housing and reinsert the mounting screws and tighten evenly.